<div class="submenu" style='display: none;'>
    <div class="submenulink">
        <div class="submenulink_l">展会搜索</div>
        <div class="submenulink_r">
<form name="form" id="form">
    <select name="jumpMenu" id="jumpMenu">
    <option>石油</option>
    <option>化工</option>
    </select>
    年份<input name="textfield" type="text" id="textfield" size="10" />
    月份<input name="textfield2" type="text" id="textfield" size="10" />
    关键字<input name="textfield3" type="text" id="textfield" size="30" />
    <input type="submit" name="button" id="zhsousuo" value="提交" />
</form>
        </div>
    </div>
</div>